Improvement in table-slide



tutti ,eine

`SEYMOUR MAY AND JOHN HOOPER, OF WATERLOO, NEW YORK.

Lette/rs Patent No. 97 ,209,-c1atell November 23, i869.

IMPROVEMENT IN TABLE-SLIDE. Y

The Schedule referred to id these Letters Patent and making part of the same.

To all whom 'it may concern:l

Be it -known that we, SEYMOUR Mir and JOHN HOOPER, both of Waterloo, in the county of Seneca, and State of New York, have invented a certain new and useful Improvement in ExtensonfTable Slides; and we do hereby declare that the following is a full and'exact description of the same, referring to the accompanying drawings, in which- Figure 1 is a cross-section of a set of extension-bars, with our improvement applied thereto. Figure 2,;i`perspective View of the end ofone of the `hars.

Figure 3, a view of one of the slides propel'.

Lilie letters of reference indicate corresponding parts in all the figures.

Our invention consists` in combining, with double `tongues connecting the bars, a central wooden block,

which forms the contact-snrface in `the sliding of the bars, as hereinafter set forth.

In the drawingsl A A A indicate the ordinaryextension-bars, which are connected at top and bottom by the usual slides The ends of each bar are provided with double tongues C O, set, one in advance of the'other, and situated at such a distance' apart, that a bearing-block, D, is situated between, which serves as the4 contactsurface, to receive the friction as the bars slide.

Both the ltongues and the blockare made of wood, the former running in grooves a a, and the latter simply resting against the side of the next bar. y

The block may be set with its grain crosswise of that of the surface on which it runs.

Our object in this invention is to produce a wooden contact' on all the frictional surfaces. By so doing, we

avoid the rusting of iron,and the consequent grinding and noise that are produced, after longstanding in damp weather. The. wood, by never oxidizing, never becomes iixed in place, but always moves freely and easily. The crossing of the grain in the block D, inn sures long wear, and prevents splintering.

Our object in placing the block D in the vertical centre, is to avoid the double friction that would occur if used at top and bottom. The double tongues C C are simply for steadying the block on opposite sides, and do not fill quite fully into the grooves, in which they rest, and therefore produce no friction in the sliding movement. Their use, however, is essential, to prevent rocking upon the block as a fulcrum.

We do not claim the use' of tongues, to produce a separation ofthe bars, as we lare aware that the same are employed in the patent of S. J. Geuung, September 7, 1869. NVe desire only to cover a special ari rangement of parts, in which wood forms the whole frictional Contact.

That we claim as our invention, and deslre to secure by Letters Patent, is

The arrangement of the wooden block D, forming the frictional surface of the hars, when combined with the douhle guide-tongues O C, onV opposite sides, for

-steadying the same, the whole operating in the manner and forthe purpose specified.

In witness whereof', we have hereunto signed our names, in the presence yof two subscribing witnesses.A

' SEYMOUR MAY.

JOHN HOOPER.

i Witnesses:

ABRAM BAGHMAN, J osnPH Kanon. 

